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Finding the Fourth Proportional to 15,111.02, 20,850 and 8,820.56

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Solution

The fourth proportional to 15,111.02, 20,850 and 8,820.56 is: 12,170.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,111.02 : 20,850 = 8,820.56 : x
  2. Step 2: Convert to fraction form
    15,111.02/20,850 = 8,820.56/x
  3. Step 3: Cross multiply
    15,111.02x = 20,850 × 8,820.56
  4. Step 4: Simplify right side
    15,111.02x = 183,908,676
  5. Step 5: Solve for x
    x = 183,908,676/15,111.02
  6. Step 6: Final answer
    x = 12,170.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.